plot the recent data with drawnow in level-2 matlab file s-function

Question

Benutzer Name 2018-8-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415253-plot-the-recent-data-with-drawnow-in-level-2-matlab-file-s-function

评论： majety 2018-8-17

Hello,

I plot a flat surface and rotate it with "drawnow" in a figure. I used to do this in a "level-2 matlab file s-function" for my Simulink simulation. It works in principal , but the figure updates the recent plot every t_out. It is like I would use the "hold on" command in a normal script. After some time its just a cylinder because Matlab saves every plot. How can I get only the recent plot in the figure, like a flat surf who rotates ?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

majety 2018-8-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415253-plot-the-recent-data-with-drawnow-in-level-2-matlab-file-s-function#answer_333144

在 MATLAB Online 中打开

You can number the figure as figure(1) and keep plotting your circle to the same figure. Make sure you get the length of your axes right so that the animation looks good. Also remember that you can use "hold off" if you don't want a cylinder from your piled up circles.

Example:

for theta =  0:pi/50:2*pi;
x =  20 *cos(theta);
y =  20*sin(theta);
originx = 0;
originy = 0;
pause(0.01);figure(1);
plot([x,originx],[y,originy],'b','LineWidth',2);hold on; 
plot(x,y,'k+','LineWidth',2);hold off;
xlim([-30,30]);ylim([-30,30]);
end

2 个评论
显示无隐藏无

Benutzer Name 2018-8-17

在 MATLAB Online 中打开

I tried it with my code but it doesn't work. You see the what's wrong?!

for x=0:pi/160:pi
pts = [4  -4  -4  4 ; 
       4  4  -4  -4 ; 
       0  0  0  0 ; 
       1  1  1  1 ];
axis equal
xlim([-10 10])
ylim([-10 10])
zlim([-10 10])
pause(0.01)
figure(1)
h1 = patch('FaceColor',[0.3010 0.7450 0.9330]);hold on;
h1.XData = pts(1,:) ./ pts(4,:);
h1.YData = pts(2,:) ./ pts(4,:);
h1.ZData = pts(3,:) ./ pts(4,:);
set(gca,'view',[30 30])
mrot = makehgtform('xrotate',x,'yrotate',0,'zrotate',0)
p2 = mrot*pts;
h2 = patch('FaceColor',[0.9290 0.6940 0.1250]);hold off;
h2.XData = p2(1,:) ./ p2(4,:);
h2.YData = p2(2,:) ./ p2(4,:);
h2.ZData = p2(3,:) ./ p2(4,:);
end